Definition of pharyngobranchial in US English:

pharyngobranchial

noun

Ichthyology
  • A bone at the dorsal end of a gill bar in many fishes.

adjective

Ichthyology
  • Of or relating to the pharynx and branchial structures; specifically designating a bone at the dorsal end of a gill bar in many fishes.

Origin

Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist.